Describes 1800 species under 30 different animal groups, found in the Delhi region. Family and genera-wise analysis of the fauna has been provided at the end, with a look at those animal species which have been lost because of habitat degradation due to rapid urbanization. Also looks at biogeography, vegetation and physiography, status of forest cover, geology, monitoring and conservation of biodiversity, role of Delhi-based NGOs, and lists the threatened fauna of the region.